mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-10 13:00:29 +03:00
728de56481
Upon leaving a critical section (such as a SpinLock) we need to check if we're already asynchronously invoking the Scheduler. Otherwise we might end up triggering another context switch as soon as leaving the scheduler lock. Fixes #2883
85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Assertions.h>
|
|
#include <AK/Function.h>
|
|
#include <AK/IntrusiveList.h>
|
|
#include <AK/Types.h>
|
|
#include <Kernel/SpinLock.h>
|
|
#include <Kernel/UnixTypes.h>
|
|
|
|
namespace Kernel {
|
|
|
|
class Process;
|
|
class Thread;
|
|
class WaitQueue;
|
|
struct RegisterState;
|
|
struct SchedulerData;
|
|
|
|
extern Thread* g_finalizer;
|
|
extern WaitQueue* g_finalizer_wait_queue;
|
|
extern Atomic<bool> g_finalizer_has_work;
|
|
extern u64 g_uptime;
|
|
extern SchedulerData* g_scheduler_data;
|
|
extern timeval g_timeofday;
|
|
extern RecursiveSpinLock g_scheduler_lock;
|
|
|
|
class Scheduler {
|
|
public:
|
|
static void initialize();
|
|
static Thread* create_ap_idle_thread(u32 cpu);
|
|
static void set_idle_thread(Thread* idle_thread);
|
|
static void timer_tick(const RegisterState&);
|
|
[[noreturn]] static void start();
|
|
static bool pick_next();
|
|
static timeval time_since_boot();
|
|
static bool yield();
|
|
static bool donate_to(Thread*, const char* reason);
|
|
static bool context_switch(Thread*);
|
|
static void enter_current(Thread& prev_thread);
|
|
static void leave_on_first_switch(u32 flags);
|
|
static void prepare_after_exec();
|
|
static void prepare_for_idle_loop();
|
|
static Process* colonel();
|
|
static void beep();
|
|
static void idle_loop();
|
|
static void invoke_async();
|
|
static void notify_finalizer();
|
|
|
|
template<typename Callback>
|
|
static inline IterationDecision for_each_runnable(Callback);
|
|
|
|
template<typename Callback>
|
|
static inline IterationDecision for_each_nonrunnable(Callback);
|
|
|
|
static void init_thread(Thread& thread);
|
|
static void update_state_for_thread(Thread& thread);
|
|
};
|
|
|
|
}
|